This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A192378 #4 Mar 30 2012 18:57:34 %S A192378 0,1,2,10,34,131,484,1812,6756,25221,94118,351262,1310918,4892423, %T A192378 18258760,68142632,254311752,949104393,3542105802,13219318834, %U A192378 49335169514,184121359243,687150267436,2564479710524,9570768574636,35718594588045 %N A192378 (A192377)/2. %C A192378 See A192377. %e A192378 (See A192377.) %t A192378 (See A192376.) %Y A192378 Cf. A192232, A192376, A192377. %K A192378 nonn %O A192378 1,3 %A A192378 _Clark Kimberling_, Jun 29 2011